V4L/DVB (8780): v4l: replace the last uses of video_exclusive_open/release

Handle the video_exclusive_open/release functionality inside the
driver.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 16 insertions, 3 deletions

diff --git a/drivers/media/video/arv.c b/drivers/media/video/arv.c
index 9e436ad3d34b..0d4f9b683459 100644
--- a/drivers/media/video/arv.c
+++ b/drivers/media/video/arv.c
@@ -116,6 +116,7 @@ struct ar_device {
         int width, height;
         int frame_bytes, line_bytes;
         wait_queue_head_t wait;
+        unsigned long in_use;
         struct mutex lock;
 };
 
@@ -742,10 +743,23 @@ void ar_release(struct video_device *vfd)
  * Video4Linux Module functions
  *
  ****************************************************************************/
+static struct ar_device ardev;
+
+static int ar_exclusive_open(struct inode *inode, struct file *file)
+{
+        return test_and_set_bit(0, &ardev.in_use) ? -EBUSY : 0;
+}
+
+static int ar_exclusive_release(struct inode *inode, struct file *file)
+{
+        clear_bit(0, &ardev.in_use);
+        return 0;
+}
+
 static const struct file_operations ar_fops = {
         .owner          = THIS_MODULE,
-        .open           = video_exclusive_open,
-        .release        = video_exclusive_release,
+        .open           = ar_exclusive_open,
+        .release        = ar_exclusive_release,
         .read           = ar_read,
         .ioctl          = ar_ioctl,
 #ifdef CONFIG_COMPAT
@@ -762,7 +776,6 @@ static struct video_device ar_template = {
 };
 
 #define ALIGN4(x)       ((((int)(x)) & 0x3) == 0)
-static struct ar_device ardev;
 
 static int __init ar_init(void)
 {